A model for the temporal organization of X- and Y-type receptive fields in the primate retina.
A model is proposed for the temporal characteristics of X- and Y-type responses of ganglion cells in the primate retina. The main suggestions of the model are: (I) The X-type temporal response is determined primarily by the delay between center and surround contributions. (II) The Y-type response is generated in the inner plexiform layer by a derivative-like operation on the bipolar cell's input, followed by a rectification in the convergence of these inputs onto the Y-ganglion-cell. (III) The derivative-like operation is obtained by recurrent inhibition in the dyad synaptic structure. The X- and Y-type responses predicted by the model, for a variety of stimuli, were examined and compared with available electrophysiological recordings. Finally, certain predictions derived from the model are discussed.
D000818:Animals; D002415:Cats; D000882:Haplorhini; D009474:Neurons / Q000502:physiology*; D010775:Photic Stimulation; D012160:Retina / Q000166:cytology* / Q000502:physiology; D013569:Synapses / Q000502:physiology; D014785:Vision, Ocular